Corrugated metallic culvert.



structed of corrugated galvanized sheet iron.

UNiTED' srnfrns PATENT JOHN ZELCH, 0F s'r.. PAUL* PARKMI'NNESOTA. i

conRUGATED-`-METaLLio 'cULvERr y speaiacatiqnpfLetten-Patent."srattd'aggraa 190e.

Application-mea February 27, isos. serial mi. 417,993.

-To"'a Z '11:71pmv 'it mayconcern:

Be 1tknown thatJ, Joux Zanon, a. citizen of the United States, residingat St. Paul 1n the county of Washington and State Park, of Minnesota,have invented a new and useful Improvement in VCorrugated MetallicCulverts, of which thefollowlng is a specification.-

My invention relates to improvements in metal culverts vof the classgenerally con- Among the principal difficulties connected iththeuse ofcorrugated pipe for this purlose'is the formation inthe field of astrong, durablejiointor coupling between the culvert sections'y withoutundue expense. To accomv plish .this eliciently, economically and simplyis the object of my invention.

' '.In the drawings, Figure 1 is a. plan of two sections of my culvert4coupled together. Fig. 2 is a central longitudinal section of Fig. 1showing the joint or coupling. Fig. 3

is' a detail showino' the ends of two sections of my culvert ready to befitted together.

The culvert sections A, which vmay be of any suitable length anddialneter, are formed of corrugated metal, preferably galvanized lsheetiron, the end'corrugations of whichare flattened to form smooth sleeves,1 and2.

The sections A are slightly greater in diameter at one end than attherotherg the dltference being justsuffici'ent to .permltthe smallerend 2 toslip into the larger sleeve l ofthe next section, and thus forma stove pipe `joint. l and 2 are provided with bolt holes 3, whlchregister with corresponding holes in the connectingsection when they aretted together.

For the purpose of reinforcing the joint formed by two connectingsection'sand'thus secure greaterstrength and durability in the couplingI use a collar 4 adapted to surround the tclescoped portions of thesleeves. This collar is preferably formed of channel iron with theflanges 5 projecting outwardly, theintermediate rib being -perforatedbybolt holes, corresponding in position wlth those Vnrt'lie 'telescopedends of the culvert sections.

The culvert sections A and collars 4 may These uncorrugated ends orsleevesy only be finished at the factory and when taken into the fieldto be placed in position, it is necessary to adjust the collar aroundlhesleeve 1 on one of the secti0ns"andslip the smaller lsleeve. 2 of theadjoining section into place, when the bolts 6 will pass into theperforatlons 3 and etiicient culvert 1s secured.

liaving described my invention, what I 'claim as new and desire toprotect by Letters latent, is:

oFF-Ion.

.55.V and through the collar'and'-r. conneeting ends of the culvert.lVhen thus 'connected and properly adjusted a j, simple 1. A culvertcomprising a plurality` of sections, aeh having a corrugated vcentralportlon and smooth ends adapted to form a stove. p1pe joint, anoutwardly flanged collar formed in one piece to surround said ends whenfitted together, said ends and collar being perforated .to receivebolts, and bolts adapted to connect the collar with the 'adlave beenlittedt-ogether.A

' Q. A culvertcomprising corrugated sec. tions each having smooth ends,one of which 'is slightly greater in (lianietel'tllan the other,

whereby-the adjacent As ectlons may be' fitted together', 1n combmationwlth flanged collar to surrpund 'and reinforce the jointv formed by thusfitting the ends together and adjustable only atthe time of formingysaid joint. y.

3. A culvert comprising .aplurality of sections, having ay corrugatedgentral portion and smooth lends, one Aof greater diameter than the otl1er, the smaller end. of a section' N. H. lViLLIAMs,

ANNA COLLINS.

whereof I yhave signed my 1n the presence of -jacentends 'of thesections after the latter an outwardly' Inadeof a single band adapted

